Knife and scissors sharpener.



R. M. SPARKS. I

KNIFE AND SCISSORS SHARPENEB. APPLICATION FILED .OCT. I1. 1916.

Patented July 1, 1517.

72M arfis UNITED STATES PATENT OFFICE.

BOLLO M. SPARKS, OF TWIN FALLS, IDAHO.

KNIFE AND SCISSORS SHARPENER.

To all whom it may concern:

Be it known that I, RoLLo M. SPARKs, a citizen of the United States, residing at Twin Falls, in the county of Twin Fallsand State of Idaho, have invented certain new and useful Improvements in Knife and Scissors Sharpeners, of which the following is a specification.

This invention relates to devices for sharpening knives, scissors, and similar tools, and consists in certain novel features which are illustrated in the accompanying drawings and will be hereinafter first fully described and then more particularly pointed out in the appended claims.

In the drawings:

Figure 1 is a side elevation partly broken away and in section of a device embodying my invention;

Fig. 2 is a front elevation of the same;

Fig. 3 is a detail perspective view of a bracket by which the grinding shaft is held in place.

In carrying out my invention, I employ a standard 1 which is provided with a recess 2 in its rear side, near its lower end, whereby it may be fitted over the edge of a table, as indicated at 3. In the lower end of the standard, I mount means for locking the same on the table and in the present drawings, I have illustrated a clamping screw 4 so disposed that it may be turned to bear against the under side of the table and force the same against the upper wall of the notch or recess 2.

The upper end of the standard is formed to present two jaws 5 and 6 having the1r inner walls flared upwardly and upon one of the said jaws, at the upper end thereof, is formed an inclined table 7, as clearly shown. The abrading body 8, which may be a stone or a file, is disposed between the jaws 5 and 6 and is carried by a grinding shaft 9 which is journaled at its lower end 10 in the standard 1 and has secured to its lower end a pinion 11 arranged within a notch or recess 12 in the standard and meshing with an idler 13 which is also housed within said recess and is retained in place by a pintle 14 inserted through the said recess from the lower end of the space between the jaws 5 and 6, as clearly shown in Fig. 1. A driving wheel 15 is mounted in any preferred manner upon the front of the standard and meshes with the pinion 13, assh own the said wheel 15 being provided with a Specification of Letters Patent. Patented July 31, 1917,

Application filed. October 11, 1916.

Serial No. 125,031.

handle 16 so that it may be readily rotated. The abrading body 8 is provided with an angular central opening or bore which fits around the correspondingly shaped portion of the driving shaft 9, so that the rotation of the shaft will be imparted directly to the said abrading body, and to prevent the stone or file wearing away the standard, a washer or collar 17 is fitted upon this shaft between the lower end of the abrading body and the standard. To prevent vibration of the shaft 9 and the body mounted thereon, I provide a bracket 18 which is secured upon theside .of the standard and engages over the upper extremity of the shaft. This bracket is preferably a metal strap having its upper extremity extending transversely over the abrading body and engaging the end of the shaft 9 so as to form a bearing for the same. The bracket is offset from the standard, as shown clearly in Figs. 2 and 3, and its lower portion is disposed to bear directly against the side of the standard, being constructed with a longitudinal slot 19 above its lower extremity and with a notch 20 in said extrernity. The notch 20 engages over a pin or stud 21 inserted in the side of the standard and a thumb screw 22 is inserted through the slot 19 into the standard so that the bracket will be retained in place. When it is desired to remove the abrading body so as to clean the same or supply a new body, it is only necessary to withdraw the thumb nut 22, after which the bracket may be lifted from its engagement with the stud 0r pin 21 and the end of the grinding shaft.

The operation of the device will be readily understood. In sharpening a lmife, the

knife blade is held against the jaw 5 or the jaw 6 with the edge downward, so that it will bear against the abrading body 8 and while the blade is held in this position, the driving wheel 15 is rapidly rotated, thereby causing the abrading body to rotate against the blade and quickly form the desired edge thereon. The inclined or beveled faces of the jaws 5 and 6 form firm supports for the knife blade and permit the operator to readily obtain the desired bevel for the cutting edge. In sharpening scissors or shears, the blade is placed upon the inclined table 7 with the edge bearing upon the abrading body and the rotation of said body will then quickly form the desired bevel on the edge of the blade.

My device is exceedingly simple in the construction and arrangement of its parts and may be very cheaply manufactured and very readily secured in position androperated and in operation will be found highly eflicient for the purposes for which it is1designed.

Having thus described the invention,what is claimed as new is:

1. A device for the purpose set forth comprising a standard having upstanding jaws V rising from its upper end and provided with upwardly flared opposed inner faces, a vertically disposed grinding shaft journaled at its lower end in the standard and rising therefrom between said jaws, an abrading body secured on said shaft between the jaws, a train of gearing housed within the standard and operatively connected to the lower end of the grinding shaft, and an actuatin member mounted externally on the standarc and arranged to impart motion to said train of gearing. V

2. A. device for the'purpose set forth com-.

ture.

adjacent the said support, an abrading body secured upon said shaft, means on the stand- 7 ard for rotating said shaft, and a bracket having its lower end secured to the standard and its upper end fitting over the said grind- 7 ing shaft.

3. A device for the purpose set forth com-j prising a standard, a grinding shaft mounted thereon, means on the standard for rotat- V375 ing said shaft, a bracket having an offset portion and having its upper end engaging i vided with a notch at its extremity and a longitudinal slot above said extremity, a pin or stud on the standard engaged in said the grinding shaft and its lower end pronotch, and a retaining device inserted 1 through said slot intothe standard.

' In testimony whereof I alfix my signa; V V

ROLLO M. srAnKs. as p w Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

' Washington, 13. 0. i 

